Oklahoma Subpoena to Testify at a Deposition in a Civil Action (AO-088A) is a document used by parties to a civil action (plaintiff and defendant) to request the presence of a witness to testify at a deposition in Oklahoma. The subpoena is typically issued by the court, or by an attorney for either party. It orders the witness to appear at a certain location and time to give testimony relevant to the case. There are two types of Oklahoma Subpoena to Testify at a Deposition in a Civil Action (AO-088A): 1. Subpoena for Testimony: This type of subpoena requires the witness to appear at a deposition and testify to facts relevant to the case. 2. Subpoena for Documents: This type of subpoena requires the witness to produce documents or records that are relevant to the case.